Does 14 carbon 14 dating mean

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A more recent innovation is the direct counting of c14 atoms by accelerator mass spectrometers (AMS).

The sample is converted to graphite and mounted in an ion source from which it is sputtered and accelerated through a magnetic field.

The first measurements of radiocarbon were made in screen-walled Geiger counters with the sample prepared for measurement in a solid form.The ensuing atomic interactions create a steady supply of c14 that rapidly diffuses throughout the atmosphere.Plants take up c14 along with other carbon isotopes during photosynthesis in the proportions that occur in the atmosphere; animals acquire c14 by eating the plants (or other animals).AMS technology has allowed us to date very small samples (such as seeds) that were previously undatable.Since there are practical limits to the age range of the method, most samples must be younger than 50,000 years and older than 100 years.

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